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Cheap flights from London Gatwick Airport to Washington, D.C. from $576

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 12/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
$626Icelandair
Thu, Jan 15 - Tue, Jan 27
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
8:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
$627Icelandair
Mon, Feb 23 - Mon, Mar 16
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
$628Icelandair
Fri, Jan 16 - Sat, Feb 7
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
$629Icelandair
Tue, Jan 13 - Thu, Jan 29
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m1 stop
$631Icelandair
Thu, Apr 9 - Thu, Apr 16
Icelandair Logo
11:55 am - 7:30 pm
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
8:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
$634Icelandair
Mon, Mar 16 - Fri, Mar 20
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m1 stop
$636Icelandair
Mon, Apr 27 - Fri, May 1
Multiple Airlines Logo
2:00 pm - 8:38 am
LGW
-
IAD
23h 38m1 stop
Multiple Airlines Logo
5:30 pm - 6:05 pm
IAD
-
LGW
19h 35m2 stops
$637Multiple Airlines
Fri, Jan 16 - Sat, Jan 31
Multiple Airlines Logo
2:00 pm - 7:40 am
LGW
-
IAD
22h 40m1 stop
Multiple Airlines Logo
1:31 pm - 10:00 am
IAD
-
LGW
15h 29m1 stop
$639Multiple Airlines
Sat, Jan 10 - Mon, Jan 26
Multiple Airlines Logo
8:25 am - 6:30 pm
LGW
-
IAD
15h 05m2 stops
Multiple Airlines Logo
7:40 pm - 6:55 pm
IAD
-
LGW
18h 15m2 stops
$640Multiple Airlines
Sun, Feb 1 - Sun, Feb 8

Icelandair flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Icelandair
Jan 15
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Jan 27
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$626
Find similar
Icelandair
Feb 23
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Mar 16
IAD8:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$627
Find similar
Icelandair
Jan 16
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Feb 7
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$628
Find similar

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
Jan 22
LGW4:00 pmLondon Gatwick
34h 00m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Jan 26
IAD5:30 pmWashington, D.C. Dulles Intl
22h 05m
2 stops
LGW8:35 pmLondon Gatwick
$653
Find similar
TAP AIR PORTUGAL
Mar 13
LGW10:45 amLondon Gatwick
15h 15m
2 stops
IAD10:00 pmWashington, D.C. Dulles Intl
Mar 15
IAD11:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
$657
Find similar
TAP AIR PORTUGAL
Jan 25
LGW9:25 pmLondon Gatwick
22h 50m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
Feb 1
IAD10:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
$659
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 11, 2025.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 1/15

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 1/27

7:40 pm-10:55 am

1 stop10h 15m

$626

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 2/23

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 3/16

8:40 pm-10:55 am

1 stop10h 15m

$627

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 1/16

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 2/7

7:40 pm-10:55 am

1 stop10h 15m

$628

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 1/13

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Thu 1/29

7:40 pm-10:55 am

1 stop10h 15m

$629

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 4/9

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Thu 4/16

8:30 pm-2:40 pm

1 stop13h 10m

$631

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 3/16

11:55 am-7:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Fri 3/20

8:40 pm-10:55 am

1 stop10h 15m

$634

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 4/27

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Fri 5/1

8:30 pm-2:40 pm

1 stop13h 10m

$636

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 1/16

2:00 pm-8:38 am

1 stop23h 38m

Washington, D.C. Dulles Intl

Sat 1/31

5:30 pm-6:05 pm

2 stops19h 35m

$637

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 1/10

2:00 pm-7:40 am

1 stop22h 40m

Washington, D.C. Dulles Intl

Mon 1/26

1:31 pm-10:00 am

1 stop15h 29m

$639

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 2/1

8:25 am-6:30 pm

2 stops15h 05m

Washington, D.C. Dulles Intl

Sun 2/8

7:40 pm-6:55 pm

2 stops18h 15m

$640

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, November is the cheapest month to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $522. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of November, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $529.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $756. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $917.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $852 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Fastest flight time

11h 30m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 30m
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 11h 30m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Harpers Ferry
Rockville
Gaithersburg
Reston
Manassas
Sterling
Fairfax

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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